Sodium Acetate → N-{4-chloro-2-[(3,4-dichlorobenzyloxyimino)methyl]phenyl}trifluoromethanesulfonamide

HRID 970870Notes

Reaction equation

HRID 970870 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][S:9]([C:12]([F:15])([F:14])[F:13])(=[O:11])=[O:10])=[C:4]([CH:16]=O)[CH:3]=1.Cl.[Cl:19][C:20]1[CH:21]=[C:22]([CH:26]=[CH:27][C:28]=1[Cl:29])[CH2:23][O:24][NH2:25].CC([O-])=O.[Na+]>CCO>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][S:9]([C:12]([F:13])([F:14])[F:15])(=[O:10])=[O:11])=[C:4]([CH:16]=[N:25][O:24][CH2:23][C:22]2[CH:26]=[CH:27][C:28]([Cl:29])=[C:20]([Cl:19])[CH:21]=2)[CH:3]=1

Participants

5

Reactant 3

HCID 517045Sodium AcetateHCID 21683122O-(3,4-Dichlorobenzyl)hydroxylamine hydrochlorideHCID 86230476N-(4-chloro-2-formylphenyl)trifluoromethanesulfonamide

Product 1

HCID 86604007N-{4-chloro-2-[(3,4-dichlorobenzyloxyimino)methyl]phenyl}trifluoromethanesulfonamideYield 66%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A solution of N-(4-chloro-2-formylphenyl)trifluoromethanesulfonamide 24 (163 mg, 0.57 mmol), O-(3,4-dichlorobenzyl)hydroxylamine hydrochloride (130 mg, 0.57 mmol) and anhydrous NaOAc (77 mg, 0.94 mmol) in EtOH (10 mL) was stirred for 15 hours at RT. The reaction mixture was concentrated under vacuum and the residue filtered through a pad of silica (eluting with CHCl3). Purification by radial thin layer chromatography (eluting with CH2Cl2/PE, 1:9) afforded N-{4-chloro-2-[(3,4-dichlorobenzyloxyimino)methyl]phenyl}trifluoromethanesulfonamide 97 (172 mg, 66%), as a colorless oil. 1H n.m.r. (200 MHz, CDCl3) δ 10.65, br s, 1H; 8.14, s, 1H; 7.66, d, J=8.8 Hz, 1H; 7.51-7.45, m, 2H; 7.35, dd, J=2.4 and 8.8 Hz, 1H; 7.27-7.22, m, 2H; 5.12, s, 2H. HRMS (M+) 459.9422.

Workup

  1. concentrationThe reaction mixture was concentrated under vacuum
  2. filtrationthe residue filtered through a pad of silica (eluting with CHCl3)
  3. customPurification
  4. washby radial thin layer chromatography (eluting with CH2Cl2/PE, 1:9)

Sources & evidence

ORD record
ord-f757246c592c46d29e7b35bb487803e4
Source dataset
uspto-grants-2007_12
Patent number
US07312248B2

Reaction notes

Loading…